Mill for rolling irregular shapes by means of a cam-pattern



UNITED STATES .IOHN S. I'IALIJ, OF COLUMBUS, O I'IIO.

MILL FOR ROLLING IRREGUL'AR SHAPES BY MEANS 0F A CAM-PATTERN.

Specification forming part of Letters Patent No. 6,079, dated January 80, 1849.

T0 @ZZ whom it may concern,.-

Be it known that I, JOHN S. HALL, of Oolumbus, in the county of Franklin and State of Ohio, have invented certain new and uscful Improvements in Rolling Iron to Pattern; and I do hereby declare that the following is a full, clear, and exact description of the principle or character which distinguishes them from all other things before known, and of the usual manner of making, modifying, and using the same, reference being had to the accompanying drawings, which form a part thereof, in which- Figure l is a perspective view. similar view of a modication. Figs. 3, a, (3, 7, and S are detached parts.

The sameletters are used to designate like parts in all the figures.

The nature of my invention consists in connecting with the rollers of an ordinary rolling-mill a cam-shaft with cams thereon to act upon the boxes in which the upper roller turns, so as to cause it to rise and fall to draw bars to any pattern. By changing the relative size ot' the gearing' I am enabled to make on a small cam a snfiicient pattern for rolling a long bar, thus making a compact au d variable machine by simply changing the gearing, or when the peculiar character of the pattern requires it making the cam move faster, so as to reduce the pattern.

The construction is as follows: The rollers d d and frame b are like those of any ordinary rolling-mill, except that the frame extends up higher on the sides; The boxes in which the upper roller turns and bears are connected by a oar c. (See Fig. 3.) Above the bar there is a cam-shaft d, on which are two cams e, one near each end. These cams are to be made of any pattern in accordance with the irregular form required to be rolled. This pattern may be shorter or longer than the article to be formed, and the cam-shaft must be geared to the bottom roller with wheels so proportioned as to turn the cam in proper ratio slower or .faster than the rollers themselves turn. Instead of making the cam to revolve entirely round, I sometimes use a segment-rack, as shown at e', Fig. 2, and weight it so that it shall keep in proper position when detached from a similar segment f, connected with the lower rollei. By this arrangement the cam-shaft is revolved part way round and then becomes detached and falls back till the roller again comes round. An inspection of the drawings will at once show these modifications, and others in the greatest variety are too obvious to suggest themselves to a competent mechanician, who can also proportion the parts to adapt themselves to the work to be done.

VHaving thus fully described my improved apparatus for rolling metal to an irregular thickness by pattern, I wish it to be understood that I do not claim moving the top roller up and down bya pattern, that having` already been done; but

What- I do claim as my invention, and d esire to secure by Letters Patent, is-

The employment of cams, as herein described, for elevating and depressing the top roller of a rolling-mill, in combination with gearing the same as above set forth, so that a pattern of any length on the cam may be made to effect the surface of any given length of bar in proportional ratio by change of the relative size of the gearing, by which I avoid in rollinglongbars any long patterns difficult to handle and expensive to construct.

.IOIIN S. I'IAIJIJ.

Witnesses:

ORsAMUs ALLEN, JOHN W. BAKER. 

